Quick answers
- Does Susan Liang accept Medicare assignment?
- Yes. Medicare's clinician data says Susan Liang accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Susan Liang see?
- In 2024, CMS data shows 973 Original Medicare patients and 3,232 services for Susan Liang. This counts Original Medicare only and measures volume, not quality.
- What is Susan Liang's NPI number?
- 1235125980. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Susan Liang, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 973 |
|---|---|
| Services billed to Medicare | 3,232 |
| Different services or procedures | 33 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Established patient complete exam of visual system (92014)735 services
- Imaging of optic nerve (92133)734 services
- Exam of visual field with extended testing (92083)598 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)330 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)196 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol74%
- High blood pressure72%
- Arthritis36%
- Diabetes30%
- Ischemic heart disease23%
- Chronic kidney disease22%
Hospitals where Susan Liang works
Medicare's Facility Affiliation Data lists Susan Liang at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Tufts Medical CenterBoston, MA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 220116
Practice locations
Addresses where Susan Liang is enrolled with Medicare (CMS data updated October 2, 2026).
- 1440 Main StWaltham, MA 02451 (781) 891‑9300
- 800 Washington StBoston, MA 02111 (617) 636‑5487
- 959 Concord St, Suite 302Framingham, MA 01701 (508) 879‑3204
Group practices
Medicare enrollment lists Susan Liang as a member of this group (CMS data updated October 2, 2026).
- Pratt Ophthalmology Associates Inc53 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Waltham
Clinicians with the same Medicare primary specialty in Waltham, MA — not a recommendation.
Other clinicians in Pratt Ophthalmology Associates Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of New York Downstate Medical Center |
| Graduation year | 2000 (26 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1235125980 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians